// tests/kb-eval/test-eval.test.mjs
// Unit tests for the deterministic scoring functions in scripts/kb-eval/eval.mjs

import { test } from 'node:test';
import assert from 'node:assert/strict';
import {
  splitFrontmatter,
  extractDescription,
  checkK2,
  checkK3,
  checkK5K6,
  checkRefConsistency,
} from '../../scripts/kb-eval/eval.mjs';

test('splitFrontmatter — separates frontmatter from body', () => {
  const c = '---\nname: x\ndescription: hi\n---\n# Body\nline2\n';
  const { body } = splitFrontmatter(c);
  assert.ok(body.startsWith('# Body'), `body was: ${JSON.stringify(body)}`);
  assert.ok(!body.includes('name: x'));
});

test('splitFrontmatter — no frontmatter returns full content as body', () => {
  const { frontmatter, body } = splitFrontmatter('# No frontmatter\ntext');
  assert.equal(frontmatter, '');
  assert.equal(body, '# No frontmatter\ntext');
});

test('extractDescription — extracts folded description value', () => {
  const fm = '---\nname: x\ndescription: >-\n  Deep guidance. Triggers on: "a", "b".\nother: y\n---\n';
  const desc = extractDescription(fm);
  assert.match(desc, /Deep guidance/);
  assert.match(desc, /Triggers on/);
  assert.ok(!desc.includes('other: y'));
});

test('checkK2 — >=3 quoted phrases passes', () => {
  const r = checkK2('Some guidance. "alpha" and "beta" and "gamma".');
  assert.equal(r.quotedPhrases, 3);
  assert.equal(r.pass, true);
});

test('checkK2 — use-when form passes even without quotes', () => {
  const r = checkK2('This skill should be used when designing X.');
  assert.equal(r.useWhenForm, true);
  assert.equal(r.pass, true);
});

test('checkK2 — plain description without quotes or use-when fails', () => {
  const r = checkK2('A plain description of the domain.');
  assert.equal(r.quotedPhrases, 0);
  assert.equal(r.useWhenForm, false);
  assert.equal(r.pass, false);
});

test('checkK3 — body within 500 lines passes', () => {
  const r = checkK3('line1\nline2\nline3\n');
  assert.equal(r.bodyLines, 3);
  assert.equal(r.pass, true);
});

test('checkK3 — body over 500 lines fails', () => {
  const r = checkK3('x\n'.repeat(501));
  assert.equal(r.pass, false);
  assert.ok(r.bodyLines > 500);
});

test('checkK5K6 — named file links count toward progressive disclosure', () => {
  const body = 'See references/foo/bar.md and references/foo/baz.md for detail.';
  const { K5, K6 } = checkK5K6(body, 10);
  assert.equal(K5.namedFileLinks, 2);
  assert.equal(K5.namedRatio, 0.2);
  assert.equal(K5.pass, true); // 0.2 >= 0.20
  assert.equal(K6.pass, true); // >=1 named start file
});

test('checkK5K6 — folder-only references fail K5 and K6', () => {
  const body = 'For detailed guidance, see references/foo/ (28 files).';
  const { K5, K6 } = checkK5K6(body, 10);
  assert.equal(K5.namedFileLinks, 0);
  assert.equal(K5.pass, false);
  assert.equal(K6.pass, false);
});

test('checkRefConsistency — cited count differing from actual is a mismatch', () => {
  const body = '| `references/foo/` | 20 | desc |';
  const r = checkRefConsistency(body, { foo: 24 });
  assert.equal(r.consistent, false);
  assert.ok(r.mismatches.some((m) => m.folder === 'foo' && m.cited === 20 && m.actual === 24));
});

test('checkRefConsistency — matching count is consistent', () => {
  const body = '| `references/foo/` | 24 | desc |';
  const r = checkRefConsistency(body, { foo: 24 });
  assert.equal(r.consistent, true);
  assert.deepEqual(r.mismatches, []);
});

test('checkRefConsistency — same folder cited with two different numbers flags inconsistency', () => {
  const body = 'prose says references/foo/ (24 files) but table `references/foo/` | 20 |';
  const r = checkRefConsistency(body, { foo: 24 });
  assert.equal(r.consistent, false);
});